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This board allows you to connect up to 8 HC-SR04 ultrasonic sensors to an Arduino over SPI, meaning that only one dedicated pin is used on the Arduino. The work of monitoring the sensors is offloaded to a microcontroller on the board, leaving the Arduino free to perform other processing.
This board can also be used with a Raspberry Pi but requires a logic level converter to convert between 3.3V and 5V.
An Arduino library is available, with example sketches, including the sketch used in the video below.
I made this for use in robotics projects, particularly autonomous vehicles. By offloading the work of monitoring ultrasonic sensors for obstacle avoidance, the main Arduino can spend more time handling navigation.
Although this was created for robotics, it can be used for any project requiring up to 8 ultrasonic sensors, making it ideal for creating musical instruments too! There's something neat about using sound measurements to make other sounds :-)
As far as I know, this is the only breakout board for 8 ultrasonic sensors on the market today.
No. HC-SR04 sensors are actually very cheap. I sell them here on Tindie for $1.99 each.
This board comes fully assembled and tested.
You will need an Arduino, some HC-SR04 ultrasonic sensors, and appropriate jumper wires (female-female to connect the sensors, and male-female to connect to the Arduino).
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I'm a professional software developer but enjoy tinkering with Arduoinos, electronics and 3D printing in my spare time. I also happen to be a Doctor Who fan. After building a Dalek back in 2012 I embarked on a quest to create a realistic voice changer based on the Arduino. It took me a long time and I wanted to share the results with other Whovians looking for the same thing, so I created this Tindie store to sell my Arduino Voice Changer Shield.
I hope to come up with other cool Arduino shields over time.